Method for identifying a person through an electrocardiogram, ECG, waveform, said method comprising: capturing ECG signals from a sample population including the person to be identified; computing sample population ECG distances ST, RT and QT from the captured ECG signals; training a computer classification model on the computed sample population ECG distances, provided that no other ECG distances are used; capturing an ECG signal from the person to be identified; computing the person's ECG distances ST, RT and QT from the person's captured ECG signal; using the classification model with the person's computed ECG distances to identify the person to be identified within the sample population. Device for identifying a person through an electrocardiogram, ECG, waveform, said device comprising means for carrying out said method.